# The position of an object moving along a line is given by #p(t) = t - 3sin(( pi )/3t) #. What is the speed of the object at #t = 4 #?

##### 1 Answer

(1)+(2)

Now it depends on the extra information given:

1.If the acceleration isn't constant:

Using the law of space for the varied linear uniform movement:

where

Assuming that the initial speed of the object is

Finally the speed of the object at t=4 is

2.If the acceleration is constant:

With the law of linear uniform movement:

You will get: